Bump html-proofer from 5.1.0 to 5.1.1 (#363)

Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Changelog](https://github.com/gjtorikian/html-proofer/blob/main/CHANGELOG.md)
- [Commits](gjtorikian/html-proofer@v5.1.0...v5.1.1)

---
updated-dependencies:
- dependency-name: html-proofer
  dependency-version: 5.1.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -11,6 +11,7 @@ GEM
       io-event (~> 1.9)
       metrics (~> 0.12)
       traces (~> 0.15)
+    benchmark (0.5.0)
     bigdecimal (3.3.1)
     console (1.30.2)
       fiber-annotation
@@ -28,9 +29,10 @@ GEM
       fiber-storage
     fiber-storage (1.0.1)
     hashery (2.1.2)
-    html-proofer (5.1.0)
+    html-proofer (5.1.1)
       addressable (~> 2.3)
       async (~> 2.1)
+      benchmark (~> 0.5)
       nokogiri (~> 1.13)
       pdf-reader (~> 2.11)
       rainbow (~> 3.0)